﻿////////////////////////////////////////////////////////////////////////////
//
// Copyright 2017 Realm Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
////////////////////////////////////////////////////////////////////////////

using System;

namespace Realms.Sync
{
    internal class Observer<T> : IObserver<T>
    {
        private readonly Action<T> _onNext;
        private readonly Action _onCompleted;
        private readonly Action<Exception> _onError;

        public Observer(Action<T> onNext = null, Action onCompleted = null, Action<Exception> onError = null)
        {
            _onNext = onNext;
            _onCompleted = onCompleted;
            _onError = onError;
        }

        public void OnCompleted()
        {
            _onCompleted?.Invoke();
        }

        public void OnError(Exception error)
        {
            _onError?.Invoke(error);
        }

        public void OnNext(T value)
        {
            _onNext?.Invoke(value);
        }
    }
}
